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Light-emitting diode cover lens design for large-scale liquid crystal device television backlight

Light-emitting diode cover lens design for large-scale liquid crystal device television backlight We present a high-performance cover lens for light-emitting diode (LED) light sources to be applied to large-scale liquid crystal device television (LCD-TV) backlight modules. The cover lens with simple structure can redistribute light rays emitted from an LED light source to make the light distribution more extended so that the luminance uniformity of the backlight module can be increased. To gain a better performance, the parameters of the lens structure are optimized using a genetic algorithm. The simulation result shows that using the cover lens can achieve a luminance uniformity of 94.75% and an optical efficiency of 72.29% for a 46-in LCD-TV backlight module. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Optical Engineering SPIE

Light-emitting diode cover lens design for large-scale liquid crystal device television backlight

Optical Engineering , Volume 49 (5) – May 1, 2010

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Publisher
SPIE
Copyright
Copyright © 2011 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
ISSN
0091-3286
eISSN
1560-2303
DOI
10.1117/1.3421791
Publisher site
See Article on Publisher Site

Abstract

We present a high-performance cover lens for light-emitting diode (LED) light sources to be applied to large-scale liquid crystal device television (LCD-TV) backlight modules. The cover lens with simple structure can redistribute light rays emitted from an LED light source to make the light distribution more extended so that the luminance uniformity of the backlight module can be increased. To gain a better performance, the parameters of the lens structure are optimized using a genetic algorithm. The simulation result shows that using the cover lens can achieve a luminance uniformity of 94.75% and an optical efficiency of 72.29% for a 46-in LCD-TV backlight module.

Journal

Optical EngineeringSPIE

Published: May 1, 2010

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